president obama expected to meet afghanistan's president, hamid karzai at the white house friday. focus to make sure there's a smooth security handover to the afghan government when nato forces leave afghanistan next year. it's still unclear how many u.s. troops will remain to train afghan security forces and focus on counterterrorism. chris lawrence outlines the proposals for the transition. >> reporter: the options are on the table. at the low end, a little more than 6,000 troops, mostly special operations forces hunting terrorists with a small amount of training for afghan forces. the 10,000 option would still focus on al qaeda, but would add conventional troops to expand afghan training. a 15,000 option would include even more conventional troops to go on limited patrols and give afghans even more support. some experts say, forget that last option. 15,000. >> it's not politically tenable in congress, it's not doable of a budget execution perspective. >> reporter: analyst stephanie sanok worked in baghdad and developed options for the iraq drawdown. between war fatigue and spen